Just when you thought the shopping mania of holiday season 2011 had passed, Macy's just announced its 24-hour Christmas store openings.

The department store will roll out the welcome mat to night owls at more than a dozen of its stores for 83 hours straight during Christmas week – a holiday tradition it's held since 2006.

Starting Dec. 21, holiday shoppers can shop to their heart's content at 14 locations until doors close at 6 p.m. on Christmas Eve.

That should give any sales reps who volunteered to work overnight just enough time to run home and collapse under the Christmas tree.

For the rest of the procrastinators out there, the chain will also keep 27 locations open until 2 a.m. on the same three days. That's 18 more 2 a.m. closings than last year.

Southern shoppers will have to make do with regular old store hours, as regions in the Northeast and Midwest dominate the extended hours list this year.

New York and California have the lion's share, with the latter nabbing 18 of the stores with 2 a.m. closings. Six New York-area Macy's will stay open 24 hours and two will stay open until 2 a.m..

“Our 24-hour stores have been a hit with holiday shoppers for the past five years,” says Ron Klein, chief stores officer, Macy’s, Inc. “Our customers have told us when they want to shop, and after-hours and overnight shopping comes out a clear winner as the countdown to Christmas gets closer."

Yeah, yeah, yeah. Just be sure to watch out for shoppers packing heat.

Here are the states where you'll find extended shopping hours Dec. 21-24: